EP1518771A1 - Maítre-cylindre pour circuit de freinage - Google Patents
Maítre-cylindre pour circuit de freinage Download PDFInfo
- Publication number
- EP1518771A1 EP1518771A1 EP04021911A EP04021911A EP1518771A1 EP 1518771 A1 EP1518771 A1 EP 1518771A1 EP 04021911 A EP04021911 A EP 04021911A EP 04021911 A EP04021911 A EP 04021911A EP 1518771 A1 EP1518771 A1 EP 1518771A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- master cylinder
- pin
- cavity
- piston
- secondary piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000012530 fluid Substances 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 229910000838 Al alloy Inorganic materials 0.000 claims description 3
- 238000000465 moulding Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000003100 immobilizing effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
- B60T11/00—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant
- B60T11/10—Transmitting braking action from initiating means to ultimate brake actuator without power assistance or drive or where such assistance or drive is irrelevant transmitting by fluid means, e.g. hydraulic
- B60T11/16—Master control, e.g. master cylinders
- B60T11/232—Recuperation valves
Definitions
- the present invention relates primarily to a master cylinder for braking system. It is known from the state of the art of the so-called clamshell master cylinder comprising a primary circuit and a secondary circuit respectively connected to two brakes arranged at the wheels of a motor vehicle. Each of the circuits is sealingly connected to a brake fluid reservoir which feeds a working chamber through a feed chamber. Each of the circuits comprises a piston itself provided with a valve adapted to hermetically separate the working chamber from the feed chamber during a braking phase.
- the valve is composed of a shutter slidably mounted in an axial passage of the piston connecting the supply chamber and the working chamber, and a support element controlling the opening and closing of said valve.
- the support element for example a pin
- the support element is mounted floating, and in the secondary circuit, the support element is fixedly mounted in the body of the master cylinder.
- the supply of the secondary circuit by the reservoir is effected by means of a stitching made in the upper part of the body of the master cylinder, and the mounting of the pin in the secondary circuit is effected by said stitching, one end upper pin opening into said stitching.
- a washer of substantially equal diameter the diameter of the stitching and coming between the upper end of the pin and the lower end of a sealing sleeve for receiving a pipe of the tank through which the brake fluid flows in the secondary circuit.
- the washer is perforated to allow the flow of brake fluid from the reservoir in the secondary circuit.
- a plastic piston is not comparable in mechanical characteristics to a conventional piston, in particular during maximum displacement of the secondary piston, it usually comes into abutment against the bottom of the body of the master cylinder. This is likely to damage the front end of the plastic piston.
- a master cylinder having a secondary piston abutting on the pin during a maximum displacement of the piston. This requires as regards the fixing or immobilization of the pin relative to the body of the master cylinder significant mechanical strength.
- the thicknesses of the materials constituting the receiving housings of the ends of the pin and immobilizing them longitudinally relative to the piston must be relatively large compared to those of a conventional master cylinder.
- some drivers for reasons of space in the engine compartment require to have a brake fluid reservoir having a lower position than conventional brake fluid tanks.
- the master cylinder no longer has means for retaining the pin in its housing before mounting the master cylinder on the vehicle. It was then proposed to force fit or mount tight at least one end of the pin in the body of the master cylinder, preferably the lower end of the pin to keep it in position before the final assembly on the motor vehicle.
- the master cylinder is mounted on the motor vehicle, it is possible that the vibrations due to the movement of the vehicle and the operation of the motor cause a transverse progression of the pin tending to escape the housing in which it is mounted to strength. Which in the long term can cause a deterioration of the master cylinder body and an increase in the dead stroke, but without creating a dangerous situation.
- the present invention therefore aims to provide a master cylinder allowing to have a brake fluid reservoir in a lower position than the tanks current but also ensuring a high level of operational safety.
- a master cylinder having a pin adapted to have a first position at least before mounting the master cylinder on the motor vehicle and have a second position after mounting the master cylinder on the motor vehicle.
- the pin of the master cylinder is mounted tight at least until the master cylinder is mounted on the vehicle, then, if the pin escapes from its tight fitting, it is retained in a position ensuring maximum operational safety
- the present invention also relates to a master cylinder comprising a body longitudinal axis, a first and a second hydraulic circuit comprising respectively a primary piston, a secondary piston, a device with primary valves and a secondary valve device, said valve devices being intended to isolate hermetically a working chamber connected to the brakes of a room power supply connected to a brake fluid reservoir, said valve devices.
- a shutter movably mounted in an axial bore of the piston and an element support for opening / closing said flap said support element being maintained tightened in the body of the master cylinder by a first end
- the master cylinder comprises means capable of preventing transverse progression by relative to the axis of the master cylinder due to the vibrations of the support means beyond a limit position.
- the present invention also relates to a master cylinder characterized in that the support element is held in a first position by force fitting into a cavity of the body of the master cylinder and in that the support element in its second position is maintained without play in a second part of the cavity of the master cylinder.
- the present invention also relates to a booster characterized in that the cavity is substantially cylindrical and axis orthogonal to the axis of the master cylinder.
- the present invention also relates to a master cylinder characterized in that the support element is a pin.
- the present invention also relates to a master cylinder characterized in that the pin has at one end forcibly mounted in the first part of the cavity a rounded shape so that the force fitting of the first end of the pin in the cavity does not cause wear of the cavity.
- the present invention also relates to a master cylinder characterized in that the secondary piston produced by molding and in that the pin form a stop stop of the secondary piston during maximum displacement of the secondary piston during a braking phase.
- the present invention also relates to a master cylinder characterized in that the secondary piston is made of plastic material.
- the present invention also relates to a master cylinder characterized in that the Secondary piston is made of aluminum alloy.
- FIG. 1 shows a master cylinder according to the present invention comprising a body of master cylinder 2 of longitudinal axis X in which is practiced a coaxial bore to the X axis, said bore 3 being closed at one end by a bottom 5.
- a through bore 3 closed at a longitudinal end by a plug mounted mounted for example by screwing or gluing.
- a primary piston 8 and a secondary piston 10 defining respectively a primary hydraulic circuit 4 and a secondary hydraulic circuit 6.
- the master cylinder is controlled by a brake pedal operated by a driver to from a passenger compartment of a motor vehicle via a control rod.
- a pneumatic brake booster is commonly interposed between the brake pedal and the master cylinder, and transmits the braking effort and assistance to the primary piston by a push rod penetrating into a rear end of the piston primary.
- the primary and secondary pistons are respectively brought to the rest position by a primary and secondary return spring 9,11.
- the primary return spring is mounted between a rear end of the secondary piston 10 and a front end of the piston 8.
- the load of the primary return spring is mounted in a cage of variable longitudinal dimension of maximum dimension predetermined and setting the load of the return spring of the primary piston.
- the cage is mounted in support against the primary and secondary pistons.
- the secondary hydraulic circuit 6 comprises a supply chamber 26 connected by sealed means 12 to a brake fluid reservoir (not shown) and a pressure chamber 28 connected to brakes arranged at the wheels of the vehicle automobile.
- the feed chamber 26 is delimited by a longitudinal lumen 30 formed in the piston body 10 and the bore 3, and the pressure chamber 28 is delimited by a longitudinal end 34 before the secondary piston and the bottom 5.
- the feeding chamber is in communication with the working chamber through a passage 36 practiced in the piston 10 and closed by a valve 18 during a braking application.
- the valve 18 comprises meanwhile a valve seat 20 carried by the piston and a shutter 22 resiliently returned against the valve seat by a spring 38.
- the shutter 22 is supported by means of a rod 40 against a support element 42 fixed mounted in the body of the master cylinder and through the light 32.
- the support element 42 is for example a cylindrical pin axis perpendicular to the axis X of the body of the master cylinder and extending from the lower part of the body of the master cylinder to the upper part of the body of the master cylinder.
- the spring 38 is advantageously held in a housing 37 made in the piston and in which opens the passage 36 by means of a hood mounted forcibly to a front end of the housing 37.
- the hood is perforated so as to allow the flow of the brake fluid from the feed chamber to the working chamber.
- the support element 42 is a cylindrical pin, but it is understood that any elongated support element may be suitable.
- the pin 42 is received in the body of the master cylinder by a first passage 50 made in the upper wall of the body of the master cylinder between a stitch 52 for receiving a supply sleeve of the brake fluid reservoir and a cylindrical cavity. practiced in the lower wall of the body of the master cylinder.
- the pin is mounted in the body of the master cylinder along an axis Y orthogonal to the axis X of the body of the master cylinder. According to the present invention, the pin is mounted tight by a first lower end in the cavity 54 of the body of the master cylinder.
- the cavity 54 comprises a first portion of smaller diameter 56 remote from the bore 3 and a second portion 58 of larger diameter connecting the bore 3 of the body of the master cylinder along the X axis and the first part 56.
- the diameter of the first portion 56 is chosen so that the mounting of the first lower end of the pin in the first portion 56 is a force fit.
- the diameter of the second portion 58 is chosen slightly greater than the diameter of the pin so that the pin is maintained with little clearance in the second portion 58.
- the diameter of the second portion 56 is substantially equal to the diameter. first pass 50.
- the diameter of the pin is 5mm
- the diameter of the first part 56 is 4.99mm
- the diameter of the second part is 5.1mm.
- the pin 42 is positioned in the second part 58 and then forced into the cavity 54 and in particular in the first part 56, so the pin can not escape the body the master cylinder when handling it when mounting the master cylinder on the vehicle or when transporting the master cylinder.
- the vibrations during the operation of the vehicle are likely to cause a displacement along the Y axis towards the top of the pin due to the tight fitting of the first end of the pin in the first part 50.
- this axial progression along the Y axis is interrupted by the fact that the first lower end of the pin will come out of the first part 50 after a certain period of operation and end up in the second part 58 in which the pin is only maintained with a small clearance but not held by clamping along the Y axis.
- the master cylinder has a fixed position, and the pin can not escape the body of the master cylinder, for example by turning the master cylinder around the X axis.
- the present invention has the advantage of being excessively simple, applicable to any type of master cylinder and not only to those having a conventional piston against which the piston bears during a maximum stroke of the secondary piston.
- it eliminates the retaining washer generally disposed in the base of the stitch 52 for receiving the brake fluid reservoir sleeve.
- a phase of operation of the master cylinder During a braking phase, the driver presses the brake pedal causing via a thrust rod advantageously actuated by a pneumatic brake booster on the primary piston and the secondary piston.
- the displacement of the secondary piston towards the bottom of the master cylinder causes the rod 40 to move away from the valve of the pin 42, closing the valve and hermetically isolating the secondary pressure chamber.
- the pressure then increases in the secondary chamber, the brake fluid under pressure being sent to the level of the brakes arranged at the wheels.
- the secondary piston abuts against the pin before coming into abutment against the bottom of the master cylinder, it is therefore the pin and the body of the master cylinder that support the force exerted by the driver on the push rod and on the secondary piston.
- the present invention applies mainly to particular motor vehicles.
- the first lower end of the pin 42 is rounded that is to say a circular edge 53 connecting a fund 55 of the pin to a wall cylindrical 57 of the pin 42 is seen in longitudinal section in the form of a circular arc of in order to avoid wear of the first portion 56 of the cavity 54 during penetration into force the first end of the pin into the cavity 56 and by the same to avoid the formation of chips that may be harmful to the sealing of the sliding secondary piston in the main bore 3.
- the present invention applies mainly to motor vehicles.
Landscapes
- Engineering & Computer Science (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Transmission Of Braking Force In Braking Systems (AREA)
- Valve Device For Special Equipments (AREA)
- Braking Systems And Boosters (AREA)
Abstract
Description
Il est connu de l'état de la technique des maítre cylindre dits à clapets comportant un circuit primaire et un circuit secondaire reliés respectivement à deux freins disposés au niveau des roues d'un véhicule automobile. Chacun des circuits est raccordé de manière étanche à un réservoir de liquide de frein qui alimente une chambre de travail par l'intermédiaire d'une chambre d'alimentation. Chacun des circuits comporte un piston muni lui même d'un clapet apte à séparer hermétiquement la chambre de travail de la chambre d'alimentation lors d'une phase de freinage. Le clapet est composé d'un obturateur monté à coulissement dans un passage axial du piston raccordant la chambre d'alimentation et la chambre de travail, et un élément d'appui commandant l'ouverture et la fermeture dudit clapet. Dans le circuit primaire, l'élément d'appui, par exemple une goupille, est monté flottant, et dans le circuit secondaire, l'élément d'appui est monté fixe dans le corps du maítre cylindre.
L'alimentation du circuit secondaire par le réservoir s'effectue par l'intermédiaire d'un piquage réalisé dans la partie supérieure du corps du maítre cylindre, et le montage de la goupille dans le circuit secondaire s'effectue par ledit piquage, une extrémité supérieure de la goupille débouchant dans ledit piquage.
De manière connue, pour maintenir en place la goupille, en particulier pour éviter que la goupille ne s'échappe du corps du maítre cylindre lors de la manipulation du maítre cylindre avant montage sur le véhicule automobile, il est prévu une rondelle de diamètre sensiblement égal au diamètre du piquage et venant s'interposer entre l'extrémité supérieure de la goupille et l'extrémité inférieure d'un manchon d'étanchéité destiné à recevoir une pipe du réservoir par laquelle s'écoule le liquide de frein dans le circuit secondaire. La rondelle est ajourée afin de permettre l'écoulement du liquide de frein du réservoir dans le circuit secondaire.
Dans le domaine de la construction automobile, le problème de poids des éléments constituant un véhicule automobile est un problème récurant . On recherche les solutions permettant de diminuer le poids des éléments permettant de réduire la consommation en carburant du véhicule automobile. Pour cela on réalise en particulier le piston secondaire en matière plastique où en alliage d'aluminium. En plus de réduire le poids du piston, l'utilisation d'éléments moulés permet de réduire également le coût de ces éléments puisque les étapes d'usinage qui sont très coûteuses, sont éliminées. Cependant un piston en matière plastique n'est pas comparable au niveau des caractéristiques mécaniques à un piston classique en particulier lors d'un déplacement maximal du piston secondaire, celui-ci vient habituellement en butée contre le fonds du corps du maítre cylindre. Ce qui est susceptible de détériorer l'extrémité avant du piston en plastique. Pour résoudre ce problème, on a proposé un maítre cylindre comportant un piston secondaire venant en butée sur la goupille lors d'un déplacement maximum du piston. Ceci requiert en ce qui concerne la fixation ou l'immobilisation de la goupille par rapport au corps du maítre cylindre une tenue mécanique importante. C'est à dire que les épaisseurs des matières constituant les logements de réception des extrémités de la goupille et immobilisant celles ci longitudinalement par rapport au piston doivent être relativement importantes par rapport à celles d'un maítre cylindre classique.
Or, certains conducteurs pour des raisons d'encombrement dans le compartiment moteur exigent d'avoir un réservoir de liquide de frein ayant une position plus basse que les réservoirs de liquide de frein classiques. Afin de pouvoir conserver le même volume de liquide de frein dans le réservoir, il est proposé de réduire l'épaisseur de la fonderie recevant les piquages et dans lequel le maítre cylindre est emmanché. Cependant, comme il n'est pas possible de réduire de manière trop conséquente l'épaisseur du logement de réception de l'extrémité supérieure de la goupille puisqu'il sert également de moyen d'immobilisation longitudinale de ladite goupille, il a été proposé de supprimer la rondelle de retenue transversale de la goupille. Ainsi, il est possible de conserver l'épaisseur de la fonderie au niveau du logement de réception de l'extrémité supérieure de la goupille et en même temps de réduire l'épaisseur du piquage. Mais le maítre cylindre ne comporte plus de moyens pour retenir la goupille dans son logement avant le montage du maítre cylindre sur le véhicule. Il a alors été proposé de monter à force ou monter serrée au moins une extrémité de la goupille dans le corps du maítre cylindre, avantageusement l'extrémité inférieure de la goupille afin de la maintenir en position avant le montage final sur le véhicule automobile. Cependant, le maítre cylindre est monté sur le véhicule automobile, il est possible que les vibrations dues au déplacement du véhicule et au fonctionnement du moteur provoquent une progression transversale de la goupille tendant à la faire s'échapper du logement dans lequel elle est montée à force. Ce qui à terme peut provoquer une détérioration du corps de maítre-cylindre et une augmentation de la course morte, mais sans pour autant créer une situation dangereuse.
En d'autres termes, la goupille du maítre cylindre est montée serrée au moins tant que le maítre cylindre n'est pas monté sur le véhicule, puis, si la goupille s'échappe de son emmanchement serré, celle-ci est retenue dans une position assurant une sécurité de fonctionnement maximale,
La présente invention sera mieux comprise à la lumière de la description qui suit et des dessins pour lesquels l'avant et l'arrière correspondent respectivement à la gauche et à la droite et le haut et le bas à la partie supérieure et la partie supérieure des dessins et sur lesquels :
- La figure 1 est une vue en coupe longitudinale d'un maítre cylindre selon la présente invention.
- La figure 2 est une vue de détails de la figure 1.
- La figure 3 est une vue en coupe transversale du maítre cylindre selon la présente invention.
- La figure 4 est une vue de détails d'un élément d'appui utilisé dans le maítre cylindre de la figure 1.
La goupille 42 est reçu dans le corps du maítre cylindre par un premier passage 50 pratiqué dans la paroi supérieure du corps du maítre cylindre entre un piquage 52 de réception d'un manchon d'alimentation du réservoir de liquide de frein et par une cavité cylindrique pratiquée dans la paroi inférieure du corps du maítre cylindre. La goupille est montée dans le corps du maítre cylindre selon un axe Y orthogonal à l'axe X du corps du maítre cylindre. Selon la présente invention, la goupille est montée serrée par une première extrémité inférieure dans la cavité 54 du corps du maítre cylindre. La deuxième extrémité supérieure selon l'axe Y de la goupille est montée dans l'alésage 50 avec un faible jeu.
Selon la présente invention, la cavité 54 comporte une première partie de plus petit diamètre 56 éloigné de l'alésage 3 et une deuxième partie 58 de plus grand diamètre raccordant l'alésage 3 du corps du maítre cylindre selon l'axe X et la première partie 56.
Le diamètre de la première partie 56 est choisi de manière à ce que le montage de la première extrémité inférieure de la goupille dans la première partie 56 soit une montage à force. Le diamètre de la deuxième partie 58 est choisi légèrement supérieur au diamètre de la goupille de manière à ce que la goupille soit maintenue avec un faible jeu dans la deuxième partie 58. De manière avantageuse le diamètre de la deuxième partie 56 est sensiblement égal au diamètre du premier passage 50.
La présente invention présente l'avantage d'être excessivement simple, applicable à tout type de maítre cylindre et non uniquement à ceux comportant un piston classique contre lequel vient en appui le piston lors d'une course maximale du piston secondaire.
De plus, il permet de supprimer la rondelle de maintien généralement disposée dans le fonds du piquage 52 de réception du manchon de réservoir du liquide de frein.
Lors d'une phase de freinage, le conducteur appuie sur la pédale de frein provoquant par l'intermédiaire d'une tige de poussée avantageusement actionnée par un servomoteur pneumatique d'assistance au freinage sur le piston primaire et sur le piston secondaire. Le déplacement du piston secondaire en direction du fonds du maítre cylindre provoque l'éloignement de la tige 40 du clapet de la goupille 42, la fermeture du clapet et l'isolement de manière hermétique de la chambre de pression secondaire. La pression augmente alors dans la chambre secondaire, le liquide de frein sous pression étant envoyé au niveau des freins disposés au niveau des roues.
Lors d'une action de freinage maximale appliquée par le conducteur sur la pédale de frein, le piston secondaire vient en butée contre la goupille avant de venir en butée contre le fonds du maítre cylindre, c'est par conséquent la goupille et le corps du maítre cylindre qui supportent l'effort exercé par le conducteur sur la tige de poussée et sur le piston secondaire.
Claims (7)
- Maítre cylindre comportant un corps d'axe longitudinal (X), un premier et un deuxième circuit hydraulique comportant respectivement un piston primaire, un piston secondaire, un dispositif à clapets primaire et un dispositif à clapet secondaire, lesdits dispositifs à clapet étant destinés à isoler hermétiquement une chambre de travail raccordée à des freins d'une chambre d'alimentation raccordée à un réservoir de liquide de frein, lesdits dispositifs de clapet comportant un obturateur monté mobile dans un alésage axial du piston et un élément d'appui destiné à l'ouverture / fermeture dudit clapet ledit élément d'appui étant maintenu serré dans le corps du maítre cylindre par une première extrémité caractérisé en ce l'élément d'appui est maintenu dans une première position par un montage à force dans une cavité (54) du corps du maítre cylindre et en ce que l'élément d'appui dans une deuxième position est maintenu sans jeu dans une deuxième partie (58) de la cavité (54) du maítre cylindre de manière à empêcher la progression transversale dudit élément d'appui par rapport à l'axe du maítre cylindre due aux vibrations du moyen d'appui au delà d'une position limite.
- Maítre-cylindre selon la revendication 1 caractérisé en ce que la cavité (54) est sensiblement cylindrique et d'axe (Y) orthogonal à l'axe (X) du maítre cylindre.
- Maítre cylindre selon l'une quelconque des revendications précédentes caractérisé en ce que l'élément d'appui est une goupille.
- Maítre cylindre selon la revendication précédente caractérisé en ce que la goupille comporte à une première extrémité montée à force dans la première partie (56) de la cavité (54) une forme arrondie de manière à ce que le montage à force de la première extrémité de la goupille dans la cavité (54) ne provoque pas d'usure de la cavité (54).
- Maítre cylindre selon l'une quelconque des revendications précédentes caractérisé en ce que le piston secondaire réalisé par moulage et en ce que la goupille forme une butée d'arrêt du piston secondaire lors d'un déplacement maximum du piston secondaire lors d'une phase de freinage.
- Maítre cylindre selon la revendication précédente caractérisé en ce que le piston secondaire est réalisé en matière plastique.
- Maítre cylindre selon la revendication 6 caractérisé en ce que le piston secondaire est réalisé en alliage d'aluminium.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0311168A FR2859965B1 (fr) | 2003-09-23 | 2003-09-23 | Maitre-cylindre pour circuit de freinage |
| FR0311168 | 2003-09-23 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1518771A1 true EP1518771A1 (fr) | 2005-03-30 |
| EP1518771B1 EP1518771B1 (fr) | 2006-11-15 |
Family
ID=34178945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP04021911A Expired - Lifetime EP1518771B1 (fr) | 2003-09-23 | 2004-09-15 | Maître-cylindre pour circuit de freinage |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1518771B1 (fr) |
| AT (1) | ATE345253T1 (fr) |
| DE (1) | DE602004003193D1 (fr) |
| FR (1) | FR2859965B1 (fr) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1553933A (fr) * | 1967-12-05 | 1969-01-17 | ||
| US4773224A (en) * | 1985-10-18 | 1988-09-27 | Toyota Jidosha Kabushiki Kaisha | Portless type master cylinder device with non return valve and restricted passage in parallel between pressure chamber and fluid reservoir |
| US5179834A (en) * | 1990-04-12 | 1993-01-19 | Alfred Teves Gmbh | Method for setting the desired closure travel of a hydraulic cylinder control valve |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4224328A1 (de) * | 1992-05-07 | 1994-01-27 | Teves Gmbh Alfred | Hauptbremszylinder mit Zentralventil und zusätzlicher die Druckmittelmenge steuernder Einrichtung |
| DE19536334A1 (de) * | 1995-09-29 | 1997-04-03 | Teves Gmbh Alfred | Geberzylinder |
-
2003
- 2003-09-23 FR FR0311168A patent/FR2859965B1/fr not_active Expired - Fee Related
-
2004
- 2004-09-15 AT AT04021911T patent/ATE345253T1/de not_active IP Right Cessation
- 2004-09-15 DE DE602004003193T patent/DE602004003193D1/de not_active Expired - Lifetime
- 2004-09-15 EP EP04021911A patent/EP1518771B1/fr not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1553933A (fr) * | 1967-12-05 | 1969-01-17 | ||
| US4773224A (en) * | 1985-10-18 | 1988-09-27 | Toyota Jidosha Kabushiki Kaisha | Portless type master cylinder device with non return valve and restricted passage in parallel between pressure chamber and fluid reservoir |
| US5179834A (en) * | 1990-04-12 | 1993-01-19 | Alfred Teves Gmbh | Method for setting the desired closure travel of a hydraulic cylinder control valve |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2859965B1 (fr) | 2006-12-15 |
| ATE345253T1 (de) | 2006-12-15 |
| FR2859965A1 (fr) | 2005-03-25 |
| DE602004003193D1 (de) | 2006-12-28 |
| EP1518771B1 (fr) | 2006-11-15 |
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